I [24M] can’t make my gf [24F] orgasm

I have been with my girlfriend for a year now. On our first date we broached the subject of orgasm, I mentioned “some are easier than others, but some women find it very difficult to cum.” She was very eager to share with me that none of the 23 partners tracked her down or took the time. Sounds like a golden ticket to Charlie’s, doesn’t it? wrong. I’ve always been incredibly supportive of the female orgasm, my success rate at the time was ~90%. A big part of my confidence in bed comes from that. I love this girl and I need to figure it out because she needs someone who knows how and sex is incomplete at this point. She’s a bit unorthodox. She often asks me to change it during oral (inconsistent = bad) when I’m working she needs creative dirty talk constantly and fast (makes it hard to focus on what’s in front of me goes), vibrator + piv + anal nothing, it takes him 40 minutes to make himself cum (regular fail/hard), and our communication is great. I could go on forever listing what we’ve tried, but I need better suggestions than a quick Google search. Has anyone been here who found the key or has the time and practice to answer? She is happy with sex but becoming sexually frustrated for life. TDR; I don’t know how to make my gf cum. It’s never been so difficult.